ARM mbed TLS up to 1.3.21/2.1.9/2.6.x HMAC Extension Crafted Application memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in ARM mbed TLS up to 1.3.21/2.1.9/2.6.x and classified as critical. This vulnerability affects unknown code of the component HMAC Extension Handler. Performing a manipulation as part of Crafted Application results in memory corruption. This vulnerability was named CVE-2018-0488. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in ARM mbed TLS up to 1.3.21/2.1.9/2.6.x. This affects an unknown part of the component HMAC Extension Handler. The manipulation as part of a Crafted Application leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0, when the truncated HMAC extension and CBC are used, allows remote attackers to execute arbitrary code or cause a denial of service (heap corruption) via a crafted application packet within a TLS or DTLS session.

The bug was discovered 02/05/2018. The weakness was presented 02/13/2018 (Website). The advisory is shared at tls.mbed.org. This vulnerability is uniquely identified as CVE-2018-0488 since 11/27/2017. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106918 (openSUSE Security Update : mbedtls (openSUSE-2018-186)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170877 (OpenSUSE Security Update for mbedtls (openSUSE-SU-2018:0491-1)).

Upgrading to version 1.3.22, 2.1.10 or 2.7.0 eliminates this vulnerability. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (106918) and SecurityFocus (BID 103057†). See VDB-113192 and VDB-113268 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• ARM mbed TLS

Version

• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.3.5
• 1.3.6
• 1.3.7
• 1.3.8
• 1.3.9
• 1.3.10
• 1.3.11
• 1.3.12
• 1.3.13
• 1.3.14
• 1.3.15
• 1.3.16
• 1.3.17
• 1.3.18
• 1.3.19
• 1.3.20
• 1.3.21
• 2.0
• 2.1
• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 106918
Nessus Name: openSUSE Security Update : mbedtls (openSUSE-2018-186)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65722
OpenVAS Name: Debian Security Advisory DSA 4147-1 (polarssl - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: ARM mbed TLS 1.3.22/2.1.10/2.7.0

Timelineinfo

11/27/2017 🔍
02/01/2018 +66 days 🔍
02/05/2018 +4 days 🔍
02/13/2018 +8 days 🔍
02/13/2018 +0 days 🔍
02/13/2018 +0 days 🔍
02/20/2018 +7 days 🔍
02/21/2018 +1 days 🔍
02/06/2023 +1811 days 🔍

Sourcesinfo

Advisory: USN-4267-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-0488 (🔍)
GCVE (CVE): GCVE-0-2018-0488
GCVE (VulDB): GCVE-100-113193

OVAL: 🔍

SecurityFocus: 103057 - ARM mbed TLS CVE-2018-0488 Remote Code Execution Vulnerability

See also: 🔍

Entryinfo

Created: 02/13/2018 20:33
Updated: 02/06/2023 14:22
Changes: 02/13/2018 20:33 (77), 01/04/2020 11:52 (5), 02/06/2023 14:22 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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